Sounds like a neat idea – the ocean already hides a lot of things. You can use tidal bores or eddies to mask noise, and the way fish schools move can signal pressure changes that might help a ship ride the same currents to stay low on sonar. Even plankton blooms scatter sound and light, so timing a move when a bloom is dense could give you a natural cloak. It’s all about reading the water’s rhythm and slipping with it.